Anybody who watches others is an observer of behaviour.
Overt: Can be outwardly seen/ sensed by an observer.Covert: Cannot be outwardly seen/ sensed by an observer.
Observer is a noun.
The German translation of observer is Beobachter.
The Texas Observer was created in 1954.
Peninsula Observer was created in 1967.
Rugby Observer was created in 1991.
Mushroom Observer was created in 2006.
The Bangladesh Observer ended in 2010.
Jacksonville Observer was created in 2009.
Samoa Observer was created in 1979.
Salem Observer was created in 1823.
Salem Observer ended in 1919.